Concrete Slump Test
Category: science
A measurement checking the consistency and workability of a freshly mixed batch of concrete.
The test measures the structural "sag" or slump of a wet concrete cone after the mold is lifted away. A high slump indicates an excessive water-to-cement ratio, which makes the wet mix easy to pour but drastically lowers the final compression strength (PSI rating) once cured.
Common Examples
- The site engineer rejected the cement delivery truck because the concrete slump test indicated the mix was too watery to meet structural code.
- Maintaining a uniform concrete slump profile across the foundation pour prevents structural weak spots from forming within the slab.